If you take the 1998 NAEP 8th grade reading scores by race, re-weight them by the new 2024 demographic makeup of American 8th graders, you will find a predicted point decline of 4.6, rather close to the actual 4 point fall over the period.
Over the same period, reading scores actually improved somewhat for each of the 1998 poorly scoring groups (and quite a bit for Asians), but the poorly scoring groups simply make up so much more of the population now that it drags everything else down.
I reformatted the table that was provided in the parent comment.
Your additional table with the additional columns for 2013 absolutely helps with the shape of the data. The data for years 2013 to 2024 erases all the gains of 1998 to 2013 (and often a bit more) and shows a worrying drop (that the pessimist in me worries is just the start of the slope).
romaaeterna · · focus · HN ↗
Over the same period, reading scores actually improved somewhat for each of the 1998 poorly scoring groups (and quite a bit for Asians), but the poorly scoring groups simply make up so much more of the population now that it drags everything else down.
| Group | 1998 NAEP | 2024 NAEP | Change |
|---|---:|---:|---:|
| White | *268* | *266* | −2 |
| Black | *242* | *243* | +1 |
| Hispanic | *241* | *245* | +4 |
| Asian/Pacific Islander | *261* | *280* | +19 |
| All public-school students | *261* | *257* | −4 |
| Race/ethnicity | 1999 Grade 8 | 2023 Grade 8 | Change |
|---|---:|---:|---:|
| White | *64.5%* | *44.0%* | −20.5 pp |
| Black | 16.1% | 14.9% | −1.2 pp |
| Hispanic | *14.3%* | *29.4%* | +15.1 pp |
| Asian/Pacific Islander* | 3.9% | 5.9% | +2.0 pp |
| American Indian/Alaska Native | 1.2% | 0.9% | −0.3 pp |
| Two or more races | not separately reported | 4.8% | — |
shagie · · focus · HN ↗
tusimi · · focus · HN ↗
shagie · · focus · HN ↗
Your additional table with the additional columns for 2013 absolutely helps with the shape of the data. The data for years 2013 to 2024 erases all the gains of 1998 to 2013 (and often a bit more) and shows a worrying drop (that the pessimist in me worries is just the start of the slope).